• Fix Testpoint footprints (move to 1/10").
• Swap pins 2&3 on U1 LM6144.
• put more space inbetween C4 & C5 on PCB (large electrolytic caps).
• Power supply LEDs?
• Fix pin mapping on Q1 and Q2. look at the data sheet, swap pins one shift CCW on Q1. look at the data sheet, swap pins 1 and 3 on Q2.
• Add test points-
• switch Q1, 2N3904, to 2N3906.

All seems ok EH 3/2/20